Guide · The crystal caves

The crystal ice cave in Iceland, explained

There is no single crystal ice cave in Iceland. The name covers the winter caves of Breiðamerkurjökull, an outlet glacier of Vatnajökull above the Jökulsárlón lagoon, and they change every year.

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Editorial team, blue-ice-cave-iceland.comUpdated October 25, 20266 minutes to read41 sources

From Jökulsárlón: Crystal Blue Ice Cave Super Jeep Tour Bookable here: the tour From Jökulsárlón: Crystal Blue Ice Cave Super Jeep Tour 4.5 (604 reviews) 3 hours from$174per person Check availabilityFree cancellation up to 24 hrs before

In a nutshell

01What it is
A tour name for the natural winter caves of Breiðamerkurjökull, not a fixed cave.12
02Where you start
The Jökulsárlón lagoon parking lot, by Route 1.3
03Time inside
One listing gives 30-45 minutes in the cave.
04Who looks after it
Park rangers are responsible for the Breiðamerkurjökull ice caves.4
05From-price
The crystal blue cave tour sold here starts from $174.

A name, not a single cave

The crystal ice cave in Iceland that fills so many travel photos is not one cave with an address. Tour companies use the word crystal for the natural caves that form in Breiðamerkurjökull, an outlet glacier of Vatnajökull, and the busiest listings at Jökulsárlón carry it in their names. The cave you visit is chosen by the guides in the winter you travel.

Ice Explorers, which runs the tour this site sells, says plainly that its caves change from season to season and even within a season, as old ones disappear and new ones form.2 NSIDC, the US snow and ice data center, calls a cave at Breiðamerkurjökull an ephemeral ice cave, which is the scientist's way of saying the same thing.1

So read crystal as a promise of clear, compressed glacier ice rather than of a particular tunnel you saw online. Listings warn that the ice can look bluer or paler as weather, snow cover and daylight change, and that the cave visited is selected for safety and the best experience on the day. That is the honest frame for any crystal ice cave tour in Iceland.

The glacier through time

Breiðamerkurjökull, from the sea to the lagoon

  1. 18th-19th centuries

    Close to the sea

    The glacier advanced until only about 250 meters separated it from the sea.5

  2. 1920s

    The retreat begins

    NASA dates the start of melting and retreat to this decade.6

  3. Around 1935

    A lagoon appears

    Jökulsárlón starts to form as the glacier pulls back.7

  4. 1973 to 2001

    Up to 2 km back

    Landsat data show the glacier receding by as much as 2 km.8

  5. 2017

    Into the park

    Breiðamerkursandur becomes part of Vatnajökull National Park.9

  6. 5 July 2019

    World Heritage

    The national park is inscribed on UNESCO's list.10

Breiðamerkurjökull, the glacier behind the caves

Breiðamerkurjökull flows south from Vatnajökull to the lagoon. Vatnajökull National Park says that after it advanced until the 18th and 19th centuries, only about 250 meters separated the glacier from the sea at the shortest distance.5 Since then it has pulled back hard: the USGS EROS Center describes it as in full retreat since about 1930.11

Where it calves into Jökulsárlón, the Icelandic Meteorological Office measured retreat of up to 200-300 m a year in recent years, faster than other glaciers.12 Researchers note that calving matters for almost no Icelandic outlet glacier except this one.13 The park itself says the fastest changes in the Breiðamerkursandur area can be seen right at this glacier front.14

The plain in front of the glacier, Breiðamerkursandur, became part of Vatnajökull National Park in 2017, and the park was inscribed on UNESCO's World Heritage List on 5 July 2019.910 Every Breiðamerkurjökull ice cave you can visit therefore lies inside a World Heritage site that is changing, quite literally, by the year.

Ratings

How the lagoon ice cave tours are rated

rating
Natural blue cave: 4.92 4.92 Natural blue caveCave & photos: 4.79 4.79 Cave & photosThis site's tour: 4.64 4.64 This site's tourLagoon cave: 4.61 4.61 Lagoon caveCrystal blue cave: 4.48 4.48 Crystal blue caveVatnajökull cave: 4.25 4.25 Vatnajökull caveCrystal cave: 4.21 4.21 Crystal cave
Average ratings of these GetYourGuide tours from Jökulsárlón as recorded; small listings carry far fewer reviews than the big ones.

Lagoon tours side by side

Ice cave tours from Jökulsárlón

TourLengthRatingFrom
Crystal blue cave & super jeep3 hours4.48from $174
Crystal cave & super jeep2.5 hours4.21from $173
Blue ice cave, this site3 hours4.64from $195
Vatnajökull guided cave3 hours4.25from $164
Lagoon cave by Local Guide3 hours4.61from $161
Natural blue cave & glacier guide3.5 hours4.92from $145

Lengths and ratings from the GetYourGuide records of the lagoon tours; a from-price shows where a tour starts, not what your date costs.

The crystal tours

Lagoon cave tours compared

From Jökulsárlón: Crystal Blue Ice Cave Super Jeep Tour Sold on this page

Crystal blue cave

Tröll Expeditions

In the cave
30-45 minutes
Rating
4.48
Price
from $174
See this tour
Jökulsárlón: Crystal Ice Cave Super Jeep Tour Headlamp included

Crystal cave

Arctic Adventures

Walk on ice
15-20 minutes
Reviews
1,751
Price
from $173
See this tour
From Jökulsárlón: Vatnajökull Glacier Blue Ice Cave Tour Up to 14

Blue ice cave

Ice Explorers

On the glacier
100 minutes
Rating
4.64
Price
from $195
See this tour

Decision helper

Which lagoon tour suits you?

They all visit Breiðamerkurjökull; the details differ

Crystal blue cave tour

It gives 30-45 minutes inside the cave.

Crystal cave tour

Its walk on the ice is about 15-20 minutes.

This site's tour

It is limited to 14 participants.

Natural blue cave tour

It starts from $145 and lasts 3.5 hours.

A longer exploration tour

Ice Explorers' longer tour typically visits two or more caves.15

At the end of the polar winter, the subglacial rivers dig their way through Europe's largest glacier and reveal sinuous ice caves.

National Snow and Ice Data Center (NSIDC)Source 16

Jökulsárlón, the lagoon where the tours start

The tours begin at Jökulsárlón, which the park calls the largest and most active glacial lake in Iceland.17 It is the mouth of a trough the glacier carved out, 200-300 m deep and 25 km long, and NASA gives its depth as 248 meters, the deepest lake in the country.1819

The lagoon is young. NASA Earth Observatory says it started forming around 1935 and has quadrupled in size since the 1970s, and NASA's visualization team adds that warm North Atlantic saltwater flowing into the basin speeds up melting and calving at the glacier edge.720 Icebergs float out toward the sea, some of them electric blue with black streaks of ash.21

Practically, the lagoon is easy to reach. The park says the region is accessible year-round and that Route 1 runs straight through Breiðamerkursandur.3 Arrive early for a tour, because the main parking lot is shared by several operators, each with its own sign and vehicles, and you need to find yours.

Map

Where Iceland's ice caves are

The lagoon, the glacier and Skaftafell on the south-east coast, then the other ice cave regions between Reykjavík, Vík and Langjökull.

Map of south-east Iceland with Jökulsárlón, Breiðamerkurjökull, Falljökull, Skaftafell and Höfn 1Jökulsárlón2Breiðamerkurjökull3Falljökull4Skaftafell5Höfn
Jökulsárlón to Skaftafell
Map data © OpenStreetMap contributors
Map of Iceland with Reykjavík, Húsafell, Langjökull, Geysir, Vík, Mýrdalsjökull and Jökulsárlón 6Reykjavík7Húsafell8Langjökull9Geysir10Vík11Mýrdalsjökull12Jökulsárlón
Ice cave regions of Iceland
Map data © OpenStreetMap contributors
  1. 1
    Jökulsárlón

    The ice cave tours meet at the lagoon cafeteria, which Ice Explorers places around 370 km east of Reykjavík and around 90 km west of Höfn.22

    In Google Maps ↗
  2. 2
    Breiðamerkurjökull

    The outlet glacier where the caves of this site form; the national park rangers of Breiðamerkursandur are responsible for its ice caves.4

    In Google Maps ↗
  3. 3
    Falljökull

    The Skaftafell hikes climb this outlet glacier of Vatnajökull; one listing spends 2.5 hours on it.

    In Google Maps ↗
  4. 4
    Skaftafell

    A national park since 1967, part of Vatnajökull National Park since 2008, with Kirkjubæjarklaustur 70 km to the west.2324

    In Google Maps ↗
  5. 5
    Höfn

    The nearest town to the east; Skaftafell lies 130 km from it.24

  6. 6
    Reykjavík

    Long day tours to the Katla cave leave from here with 27 pickup location options.

  7. 7
    Húsafell

    The meeting point for the ice tunnel in Langjökull, about 2 hours from Reykjavík.

  8. 8
    Langjökull

    About 953 km2, the second-largest glacier in Iceland, with a man-made tunnel 500 metres long.2526

    In Google Maps ↗
  9. 9
    Geysir

    Snowmobile tours to a natural ice cave on Langjökull meet behind the visitor centre.

  10. 10
    Vík

    The start of the Katla cave tours, and Iceland's southernmost village.27

    In Google Maps ↗
  11. 11
    Mýrdalsjökull

    The ice cap over the Katla volcano, about 535 km2; the cave sits in its outlet glacier Kötlujökull.2829

  12. 12
    Jökulsárlón lagoon

    At 248 metres deep, NASA calls it the deepest lake in Iceland.19

    In Google Maps ↗
Open the map in Google Maps

Checklist

For a lagoon cave morning

01

Getting there

  • Drive Route 1 to the Jökulsárlón parking lot
  • Arrive early, before departure time
  • Look for your operator's sign and vehicle
02

On the ice

  • Keep the helmet on in the cave
  • Crampons on for the walk
  • A phone or camera that works in low light

Calculator

Price a lagoon cave tour

Choose a tour and enter how many people are going

People 2

Total from$347

per participant from $174

Check availabilityfree cancellation

We take the cheapest GetYourGuide price of the ice cave tour you choose, multiply it by your group and convert it with the ECB daily rate; checkout on GetYourGuide has the final figure.

Video

Hiking Breiðamerkurjökull glacier to its ice caves

No video data loads before you press play.

How a crystal ice cave tour in Iceland runs

The format is similar across operators. Tröll Expeditions, whose crystal blue cave tour this page sells, meets at the Jökulsárlón parking lot 15 minutes before departure, drives 30 minutes, spends 1 hour at a blue ice cave of Breiðamerkurjökull with a safety briefing, and drives 30 minutes back. It starts from $174 and is rated 4.48 from 604 reviews.

Arctic Adventures' version with Glacier Mice drives about 20-30 minutes to the glacier edge, then walks about 15-20 minutes on the ice, with a helmet, headlamp and crampons provided. The tour this site sells, run by Ice Explorers, drives 45 minutes each way and spends about 100 minutes at Breiðamerkurjökull.

All of them depend on the glacier. One listing says tours may be changed or cancelled if the National Park authorities consider conditions unsafe, and that customers get a full refund if the operator cancels. A flexible booking matters here, and these lagoon tours all let you cancel free of charge up to 24 hours ahead.

What you will see inside

Expect ice that changes color with the light. Ice Explorers describes colors that run from bright blue through emerald green to black.30 NSIDC's caption for a Breiðamerkurjökull cave describes light moving between the blue of pure ice, the white of fresh snow and the black of volcanic ash trapped in the glacier.31

The shape is never fixed. Local Guide, another lagoon operator, says the blue feature on Breiðamerkurjökull can be an ice cave, a tunnel or a canyon depending on weather and glacier conditions, with a hike of around 1-5.5 km to reach it. Ice Explorers says its cave may sit at the edge of the glacier or need a short walk of 500-1000m on the ice.32

Inside, time goes quickly. One tour gives you 30-45 minutes in the cave, which is enough for photos if you do not spend all of it on a single angle. Look up at the ceiling scallops and at the layers in the walls as well as at the obvious blue, and remember that other groups may be using the same cave.

Building a day around the lagoon

A cave tour from the lagoon takes a morning or an afternoon, which leaves room for more. Fjallsárlón, a smaller glacier lagoon in front of Fjallsjökull on the same Breiðamerkursandur plain, lies 10 kilometers from Jökulsárlón.33 It is a quieter place to watch ice meet water before or after your tour.

Where you sleep shapes the day. Ice Explorers places the lagoon cafeteria around 90 km west of Höfn, the nearest town to the east, while Skaftafell lies to the west with Kirkjubæjarklaustur 70 kilometers beyond it.2224 Ice Explorers runs its cave tour twice a day, a morning departure and one right after noon, so either base works.34

Winter driving is the real constraint. Safetravel warns that a 4x4 car can help in some winter conditions but does not remove the risk of skidding on ice, and advises staying flexible and ready to change plans when conditions turn unsafe.3536 Give yourself daylight for the drive to the lagoon, and treat the cave as the fixed point of the day rather than squeezing it between long transfers.

Safety and who guides you

Breiðamerkurjökull's caves are supervised. The park's Breiðamerkursandur rangers handle maintenance and supervision at Jökulsárlón every day of the year and are also responsible for the ice caves in the glacier.4 When UNESCO inscribed the park, the World Heritage Committee recommended that Iceland adopt effective certification for commercial operators and guides working in it.37

Ice Explorers says all of its glacier guides are professionally certified by the Association of Icelandic Mountain Guides.38 Its terms list ice collapses among the natural hazards guests may meet, alongside unpredictable weather, shifting glaciers and strong winds.39 Safetravel adds that crevasses can appear with limited warning signs.40

The hazards are real, and they are the reason never to walk into a glacier cave without a guide. Visit Iceland advises that an ice cave should always be visited with professional glacier guides and the right equipment.41 Listen to the briefing, keep your helmet on, and stay where the guide tells you to stand.

This winter's cave

Next winter's caves will look different.

Pick a date between October and April and see the ice as it is this season.

See datesfrom $195 · free to cancel 4.6 · 961 confirmed reviews

You ask,we answer.

Is the crystal ice cave a real place?

It is a tour name. Operators use it for the natural winter caves of Breiðamerkurjökull, which change every season.2

Where do the crystal cave tours start?

At Jökulsárlón. Tröll Expeditions meets at the lagoon parking lot 15 minutes before departure.

How long do you spend in the cave?

About 30-45 minutes on one tour. That listing spends 1 hour at the cave in total, with a safety briefing.

Is the cave the same every year?

No. Ice Explorers says the ice caves change from season to season, as old ones disappear and new ones form.2

Will the cave be bright blue?

Not guaranteed. Listings say the blue can look stronger or weaker with the weather, the snow cover and the light.

Can a tour be cancelled for safety?

Yes. Tours may be changed or cancelled if the National Park authorities judge conditions unsafe.

How deep is Jökulsárlón?

248 meters, says NASA. NASA Earth Observatory calls it the deepest lake in Iceland.19

Sources

The sources for this guide

  1. 1
    National Snow and Ice Data Center (NSIDC)Science of Glaciers
    ↩
  2. 2↩
  3. 3↩
  4. 4↩
  5. 5↩
  6. 6
    NASA Earth ObservatoryIceland’s Glacial Lagoon
    ↩
  7. 7
    NASA Earth ObservatoryIceland’s Glacial Lagoon
    ↩
  8. 8
    NASA Earth ObservatoryReceding Glacier in Iceland
    ↩
  9. 9↩
  10. 10↩
  11. 11
    U.S. Geological Survey (EROS Center)Breidamerkurjokull Glacier, Iceland
    ↩
  12. 12↩
  13. 13
    Frontiers in Earth Science (Aðalgeirsdóttir et al., University of Iceland and Icelandic Meteorological Office)Glacier Changes in Iceland From ~1890 to 2019
    ↩
  14. 14↩
  15. 15↩
  16. 16
    National Snow and Ice Data Center (NSIDC)Science of Glaciers
    ↩
  17. 17
    Vatnajökull National ParkGlaciology - Vatnajökull National Park
    ↩
  18. 18
    Vatnajökull National ParkGlaciology - Vatnajökull National Park
    ↩
  19. 19
    NASA Earth ObservatoryIceland’s Glacial Lagoon
    ↩
  20. 20
    NASA Scientific Visualization StudioThe Receding Breiðamerkurjökull Glacier, Iceland
    ↩
  21. 21
    NASA Earth ObservatoryIceland’s Glacial Lagoon
    ↩
  22. 22↩
  23. 23
    Vatnajökull National ParkSkaftafell - Vatnajökull National Park
    ↩
  24. 24
    Vatnajökull National ParkSkaftafell - Vatnajökull National Park
    ↩
  25. 25↩
  26. 26↩
  27. 27
    Visit South IcelandVÍK
    ↩
  28. 28
    Katla UNESCO Global GeoparkMýrdalsjökull (jarðvætti)
    ↩
  29. 29
    Extreme Iceland (Arctic Adventures)Katla Ice Cave Tour 2026
    ↩
  30. 30↩
  31. 31
    National Snow and Ice Data Center (NSIDC)Science of Glaciers
    ↩
  32. 32↩
  33. 33↩
  34. 34↩
  35. 35
    Safetravel (ICE-SAR)Winter driving - Safetravel
    ↩
  36. 36
    Safetravel (ICE-SAR)Winter driving - Safetravel
    ↩
  37. 37↩
  38. 38↩
  39. 39↩
  40. 40↩
  41. 41
    Visit Iceland (Business Iceland)Ice-Cave Exploration - Going inside a glacier
    ↩

Keep reading

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Blue ice cave tour from Jökulsárlón 4.6 (961) · Free cancellation As a rule, gone 6 days before the date from$195 Check availabilityfrom $195 · reserve, pay later